* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-container {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
    width: 400px;
    max-width: 90%;
}

.login-title {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #1a73e8;
}

.admin-login {
    background: #f8f9fa;
    border-left: 4px solid #6c757d;
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: #495057;
}

input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 1rem;
}

button {
    width: 100%;
    padding: 0.8rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

.user-btn {
    background: #1a73e8;
    color: white;
}

.admin-btn {
    background: #6c757d;
    color: white;
}

.toggle-option {
    text-align: center;
    margin: 1.5rem 0;
    padding: 0.5rem;
    background: #e9ecef;
    border-radius: 4px;
}

.error-message {
    color: #dc3545;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    display: none;
}